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/*!   
 *    Description: Engine implementation for Audio recorder example. 
 */

#ifndef __AUDIOENGINE_H__
#define __AUDIOENGINE_H__

// INCLUDES
#include <e32base.h>
#include <mdaaudiosampleeditor.h>

// FORWARD DECLARATIONS
class AudioRecorderPrivate;

/*!
 * This class will demonstrate the multimedia framework APIS which are used to play
 * a audio file.
 * - Play the recorded file.
 * - Record supported format audio into a file.
 * - Stop and close the recording.
 */
class CAudioRecorderEngine : public CBase, MMdaObjectStateChangeObserver

    {
public:
    static CAudioRecorderEngine* NewL(AudioRecorderPrivate* audioRecorderPvt);
    static CAudioRecorderEngine* NewLC(AudioRecorderPrivate* audioRecorderPvt);
    
public:    
    void PlayL();
    void Stop();
    void RecordL();    
    ~CAudioRecorderEngine();
    /** from MMdaObjectStateChangeObserver,Change in sound recorder state.
    @param aObject Recorder object
    @param aPreviousState Last state
    @param aCurrentState Current state
    @param aErrorCode Any error that has occurred */
    void MoscoStateChangeEvent(CBase* aObject, TInt aPreviousState, 
            TInt aCurrentState, TInt aErrorCode);

private:
    void ConstructL();
    CAudioRecorderEngine(AudioRecorderPrivate* audioRecorderPvt);
    
private: 
    RFs iFs; // Filse server object to connect to the server.
    CMdaAudioRecorderUtility* iRecorderUtility; // Object of this class is used to exercise the recording utility of multimedia framework.
      
public:
    AudioRecorderPrivate* iAudioRecorderPvt; // This pointer handler to the private class is used to print responses on to the UI.
    TBuf<256> iResponse; // write the response of the methods to this buffer.    
    };

#endif /* AUDIOENGINE_H_ */
